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Finding the Fourth Proportional to 57,940.40, 87,040.20 and 55,578.80

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Solution

The fourth proportional to 57,940.40, 87,040.20 and 55,578.80 is: 83,492.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,940.40 : 87,040.20 = 55,578.80 : x
  2. Step 2: Convert to fraction form
    57,940.40/87,040.20 = 55,578.80/x
  3. Step 3: Cross multiply
    57,940.40x = 87,040.20 × 55,578.80
  4. Step 4: Simplify right side
    57,940.40x = 4,837,589,867.76
  5. Step 5: Solve for x
    x = 4,837,589,867.76/57,940.40
  6. Step 6: Final answer
    x = 83,492.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.